Autoprep instrument



FIG. 1 is a right front perspective view of an autoprep instrument embodying our design;

FIG. 2 is a top plan view of the autoprep instrument;

FIG. 3 is a bottom plan view of the autoprep instrument;

FIG. 4 is a front elevation of the autoprep instrument;

FIG. 5 is a rear elevation of the autoprep instrument;

FIG. 6 is a right side elevation of the autoprep instrument; and,

FIG. 7 is a left side elevation of the autoprep instrument. 

The ornamental design for an autoprep instrument, as shown. 